Tamper.



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APPLICATION FILED MAY 17. 1907.

INVENTOR UNITED STATES PATENT @FFICE.

HOMER B. JOHNSON, OF ATLANTA, GEORGIA.

TAMPER.

T 0 all whom it may concern:

Be it known that I, HOMER B. JOHNSON, of Atlanta, in the county of Fulton and State of Georgia, have invented certain new and useful Improvements in Tampers; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in tampers,the object of the invention being to provide a tamper for concrete, which shall be light in weight, simple and strong in construction, and which will erform the functions usually accomplished by such a tool, but which will also operate to force the larger particles of the plastic concrete mass downward from the surface, leaving the smaller stones and mortar of the concrete near the upper surface thus forming a material suitab e for a top finish or wearing face.

A further object is to so construct the device that any entrapped air which may be contained in the mass of concrete can be readily dissipated and the concrete rendered dense and non-porous.

A further object is to so construct the tamper that it can be operated to work the upper portion of the concrete body into a material suitable for a top finish or wearing coat, during the operation of tamping and at the same time make the entire mass compact.

A further object is to provide a tamper, with the use of which the finishingor wearing coat of a concrete floor or sidewalk can be effectually united with the coarser base mass.

With these objects in view the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a tamper embodying my improvements. Fig. 2 is an edge view of'same. Fig. 3 is a plan view, and Figs. 4, 5, 6 and 7 illustrate modifications.

1 represents the head of my improved tamper which comprises a series of comparatively thin metal lates 2 spaced apart by collars 3 mounte on the rod 4 passing through the several plates of the series. The rods 4 are spaced apart and afford means for attachment of a bail 5, to which a handle 6 is secured.

In the construction shown in Fig. 6, the

Patented March 3, 1908.

Serial No. 374,255.

plates 2 are formed of a single stri of metal bent back and forth upon itself,tfie parallel portions forming the plates 2 being held spaced apart and connected with a handle in the same manner as shown in Figs. 13, or the thin working edges may be made in the form of a spiral, as shown in Fig. 7. Instead of making the plates 2 as above described, they may be made circular to form wheels 7, as shown in Figs. 4 and 5. These wheels are mounted upon a shaft 8 and spaced apart by collars 9. A yoke 10 is attached to the ends of the shaft 8 and to this yoke, a suitable handle 11 is secured.

With the use of my improved tamper, the lar er particles of the plastic concrete mass wil lbe forced downward from the surface by the action of the thin knife-like plates or working face, leaving the smaller stones and mortar of the concrete near the upper surface and thus forming a material suitable for a top finish or wearing coat. The knife-like edges of the plates will also operate to break any entrapped-air bubbles which, might be contained in the mass and in this way render the latter dense and non-porous. My impoved tamper will also operate to effect a union between a top or finishing coat and a coarser base, at the same time forcing the larger sized particles into the base and preventing their penetration through the top or finishing coat.

Various slight changes might be made in the mechanical details of the devices without departing from the spirit of my invention or limiting its scope and hence I do not wish to restrict myself to the precise form and arrangement of parts herein set forth.

Having fully described my invention what I claim as new and desire to secure by Letters Patent, is,

1. A tamper comprising a series of thin, parallel members spaced apart and secured together, the lower edge of each member constituting a tamping face, and means connected with said members for operating thesame.

2. A tamper comprising a series of thin plates or disks spaced apart and secured together, the lower edge of each plate or disk constituting a tamping face, and means connected with the plates or disks for operating the same.

8. A tamper comprising a series of plates each of uniform thickness, rods passing therethrough, collars on the rods spacing said plates apart, and a handle connected with said rods.

4. A tamper comprising a series of plates each of uniform thickness, spacing devices between the plates, a rod. passing through the plates and spacing devices, a handle, and means for connecting the handle with said rod.

5. A tamper comprising a series of plates, collars spacing the plates apart, said collars arranged in two series, a rod. passing through each series of collars and the plates, a bail secured to the respective rods, and a handle secured to said bail.

6. A tamper having a Working face pre senting, transversely, a series of thin tamping faces spaced apart and movable simultaneously in the same direction.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

HOMER B. JOHNSON.

Witnesses C. H. MAR UEss, W. D. HAYs. 

